Markets sometimes produce outcomes that do not match a manager’s skill. Several outlets explain that even a capable portfolio manager can underperform because of bad luck, which can make it difficult to generate consistent “alpha” over time.
In this view, the challenge is not necessarily poor decision-making. Instead, the performance attributed to skill versus randomness is hard to separate, especially when results vary across periods. As a result, managers may appear unable to produce alpha consistently even when they follow sound strategies.
Across the coverage, the central point is the same: persistence of alpha is influenced by both skill and unpredictable market factors. The differing emphasis across sources is limited, with both pointing toward randomness and statistical variation as key reasons alpha can be elusive.
